I ran a series of 1-second interval automatic screengrabs on the French DVDs since I wanted some good still images from the show for my game's mission briefings.
I ended up having to use the French ones because the others are either fuzzy, the aspect is completely wrong so the Earth in space, above MoonBase, looks like a Ford logo, or the colours are washed-out.

Once it reached episode 4, it captured what I'd noticed in the past; which is a little ground-based radar, presumably directing the twin laser turrets.